Reading a CFS entry

The Canada Flight Supplement lists the facts about every aerodrome, one packed entry each: elevation, runways, radio frequencies, fuel. Every line has a label, so find the label and read off the value:

• ELEV: aerodrome elevation in feet ASL (used for circuit height and density altitude).
• RWY: each runway's identifier, length (ft), and surface. The identifier is the magnetic heading with the last digit dropped, i.e. heading ÷ 10 (08/26 ≈ 080°/260°), TP 1102.
• MF / ATF: the mandatory (RAC 4.5.4) or aerodrome traffic (RAC 4.5.5) frequency and the radius it covers (MF 122.8 5NM), what you listen on near an uncontrolled field. Not the same as ATIS, UNICOM (RAC 1.2.1), or tower/ground.
• FUEL, HRS: fuel grades available and hours of operation (in UTC).

Trap: pulling the wrong field, e.g. the ATIS frequency when asked for the MF, or the field elevation when asked a runway length. The confusable numbers all sit in the same entry.

Note: the packed CFS entry LAYOUT (field order, abbreviations, fuel-grade codes) is CFS legend, a paid NAV CANADA product not included here, and changes between editions; confirm against the current CFS. The field meanings above are grounded in the TC AIM/TP 1102 cites.

Practice